CN210814565U

CN210814565U - Built-in cooling device of absorption tower

Info

Publication number: CN210814565U
Application number: CN201920651507.1U
Authority: CN
Inventors: 郝开开; 常春梅; 侯霄艳; 孙海生; 向凯
Original assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanzhou Petroleum Machinery Research Institute
Current assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanzhou Petroleum Machinery Research Institute
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-06-23
Anticipated expiration: 2029-05-08

Abstract

A built-in cooling device of an absorption tower comprises an absorption tower shell, wherein the absorption tower shell consists of a tower section, an upper tower body and a lower tower body, all the parts are connected into a whole by detachable flanges, and a cooling device is arranged in the absorption tower shell. The tower section and all parts forming the built-in cooling device of the absorption tower are taken as a whole, the cooling device can be lifted away for maintenance by disassembling the flanges arranged at the upper end and the lower end of the tower section, and the structure is simple; the built-in plate cooler has high heat exchange efficiency, occupies small space in the tower, is connected with each process pipe orifice through a flange, and is convenient to overhaul and maintain.

Description

Built-in cooling device of absorption tower

Technical Field

The utility model relates to a heat transfer and mass transfer equipment in the chemical industry, in particular to a built-in cooling device of an absorption tower.

Background

Semi-water gas produced by gasification using coal, natural gas, petroleum or the like as a raw material always contains sulfide and CO2 as impurities which are not required for production, and therefore, it is necessary to perform desulfurization and decarburization treatment. In many industrial fields such as petrochemical industry, coal chemical industry, air pollution control and the like, a tower is used for separating and purifying a mixture. The absorption tower is a device for realizing absorption operation, the flow mode of gas-liquid two phases in the tower usually adopts counter-current operation, and the absorbent is added into the tower top and flows from top to bottom, and contacts with the gas flowing from bottom to top to carry out component transfer and separation. Heat is typically provided to or removed from the column, typically by withdrawing a stream from the column, passing it through a heat exchanger external to the column shell for heat exchange, and returning at least a portion of the stream, after cooling or heating, to the column.

When a flow is led out from the tower and the cooler is arranged outside the tower, the difficulty of piping is high, and the cost of piping is greatly increased. Meanwhile, a complex pipeline brings large pressure drop loss and occupies a large part of the total pressure drop, so that the pressure drop loss of the cooler is smaller, and the difficulty in type selection of the cooler is increased. In addition, when the cooler medium is corrosive or harmful, the cooler is arranged outside the tower, so that the risk of medium leakage is increased, and safety and environmental pollution accidents are easily caused once the medium is leaked.

Based on the above-mentioned shortcoming of external cooler, place the heat exchanger in the tower and receive more and more favour, and current patent number CN 105771556B describes an integral type heat transfer absorption tower, and it sets up annular heat exchanger in the tower, and its heat exchange efficiency is limited, need occupy great tower inner space usually, because the attribute that can not dismantle when the heat exchanger needs to overhaul in the tower, overhaul often more difficult. In addition, the built-in annular heat exchanger is mainly used for exchanging heat of feed gas ascending at the tower bottom, but is not suitable for exchanging heat of descending absorbent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, heat exchange efficiency are high, overhaul and change convenient absorption tower built-in cooling device.

The utility model discloses a following technical scheme realizes above-mentioned technical purpose:

a built-in cooling device of an absorption tower comprises an absorption tower shell, wherein the absorption tower shell consists of a tower section, an upper tower body and a lower tower body, all the parts are connected into a whole by detachable flanges, and a cooling device is arranged in the absorption tower shell.

The cooling device is a plate cooler, an upper hot side inlet pipe box of the cooling device is communicated with the upper tower body through a hot medium inlet arranged at the center of a flow distribution plate in the shell of the absorption tower, a lower hot side outlet pipe box of the plate cooler is communicated with a distributor through a detachable flange, and a plurality of chimney barrels are radially arranged on the flow distribution plate; and cold side inlet and outlet pipe boxes of the plate cooler are in through connection with a cold medium inlet and outlet arranged on the wall of the tower section through detachable flanges.

The chimney cylinder is composed of a shielding cap, a plurality of supporting ribs and a cylinder section, the cylinder section is arranged along the radial direction of the flow distribution plate and is higher than the flow distribution plate, one end of each supporting rib is connected with the cylinder section, and the other end of each supporting rib is connected with the shielding cap.

1. The tower section and all parts forming the built-in cooling device of the absorption tower are taken as a whole, the cooling device can be lifted away for maintenance by disassembling the flanges arranged at the upper end and the lower end of the tower section, and the structure is simple; the built-in plate cooler has high heat exchange efficiency, occupies small space in the tower, is connected with each process pipe orifice through a flange, and is convenient to overhaul and maintain.

2. The utility model avoids the trouble of installing a cooler outside the tower by arranging the cooling device in the absorption tower; the cost of pipelines, supports and civil engineering for installing the cooler outside the tower is saved; the pressure drop loss of the system is reduced; the space saving reduces the investment and operating cost.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a sectional view taken along the line A-A in FIG. 1

FIG. 3 is a schematic view of a chimney barrel of the present invention

Numbering in the figures:

1. the heat exchanger comprises a splitter plate, 2. a chimney barrel, 3. a plate cooler, 4. a distributor, 5. a tower section, 6. an upper tower body, 7. a lower tower body, 201. a shielding cap, 202. a supporting rib, 203. a barrel section, 301. a hot side inlet pipe box, 302. a heat exchange plate bundle group, 303. a hot side outlet pipe box, 304. a cold side inlet pipe box, 305. a cold side outlet pipe box, 501. a cold medium inlet, 502. a cold medium outlet.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, a cooling device built in an absorption tower includes a flow distribution plate 1, a chimney 2, a plate cooler 3, a distributor 4, and a tower segment 5. The splitter plate 1 is located on the upper part of the plate cooler 3 and is connected with the hot side inlet pipe box 301 through a detachable flange, and is used for guiding the absorbent to be cooled after component transfer and separation to enter the plate cooler 2 for cooling. The outer edge of the flow distribution plate 1 is welded and connected with the inner wall of the tower section 5, so that the absorbent is prevented from leaking due to the fact that the absorbent does not flow through the plate cooler for cooling. A plurality of chimney barrels 2 are radially arranged on the flow distribution plate 1 to form an ascending gas channel, so that gas flowing through the chimney barrels 2 is contacted with absorbent before cooling at the upper part of the tower section 5 to carry out component transfer and separation. The distributor 4 is located at the lower part of the plate cooler 3 and is connected with a cooler hot side outlet pipe box 303 through a detachable flange, and the absorbent flowing out of the plate cooler 3 passes through the distributor 4 to be fully contacted with the ascending gas. The cold side inlet pipe box and the cold side outlet pipe box of the plate cooler 3 are connected with the cold medium inlet pipe box and the cold medium outlet pipe box which are arranged on the wall of the tower section 5 through detachable flanges, and the cold medium is introduced from the outside of the tower section 5 and forms reverse flow with the absorbent in the plate cooler, so that dividing wall type heat exchange is carried out, and the removal of heat generated by the component transfer and separation in the tower is realized. Compared with the traditional tower externally provided with a cooler, the device arranges the cooler in the tower, reduces extra connecting pipelines, and simultaneously, the tower section and the cooler are connected with other parts through flanges, so that the cooler can be conveniently taken out from the tower section.

The utility model discloses can be according to the design of absorption tower, tower festival 5 and constitute the built-in cooling device's of absorption tower all parts as a whole, through setting up flange and last tower body 6 and tower body 7 of upper and lower end at the tower festival and link to each other, as an integral part, when cooling device need overhaul, can dismantle this cooling device and hang from the maintenance. As the core heat exchange unit of the cooling device, when the plate cooler 3 needs to be cleaned and maintained, the flange connected with the plate cooler 3 can be taken out from the tower section for cleaning, maintenance or replacement by disassembling the flange.

The utility model discloses in, plate cooler 3 adopts efficient heat transfer board to restraint group 302 as heat transfer element, and this heat transfer board restraints group 302 is folded by a plurality of heat transfer board pipes and falls the welding and form, and every heat transfer board pipe is buckled mutually through the seal weld on both sides by two corrugated metal plate or bubbling board, and the medium is left at both ends and is imported and exported, and the both ends seal weld after every two heat transfer board pipes are folded, and the import and export of another medium is left on both sides. The plate cooler is provided with a hot side inlet pipe box 301, a heat exchange plate bundle group 302, a hot side outlet pipe box 303, a cold side inlet pipe box 304 and a cold side outlet pipe box 305, wherein all four inlet and outlet process pipe orifices are connected with other parts through flanges, and the plate cooler can be lifted away from the tower section for cleaning, overhauling or replacing by disassembling the pipe orifice flanges during overhauling. The plate cooler 3 is vertically or horizontally arranged in the tower, and the direction of the connecting pipe can be flexibly adjusted.

As shown in fig. 3, the chimney 2 is composed of a shielding cap 201, a support rib 202 and a barrel section 203, the barrel section 203 is arranged along the radial direction of the flow distribution plate and is higher than the flow distribution plate, the support rib 202 is used for supporting and fixing the shielding cap 201, and gas can flow out from the gap between the support ribs 201. The shielding cap 201 prevents the absorber descending from the top of the tower from being collided with the gas ascending from the bottom of the tower to cause leakage flow of the absorber. The chimney barrel can also adopt a one-way valve.

Claims

1. A built-in cooling device of an absorption tower comprises an absorption tower shell and is characterized in that the absorption tower shell consists of tower sections, an upper tower body and a lower tower body, all the parts are connected into a whole by detachable flanges, and the cooling device is arranged in the absorption tower shell.

2. The absorption tower internal cooling device according to claim 1, wherein the cooling device is a plate cooler (3), an upper hot side inlet pipe box (301) of the plate cooler is communicated with the upper tower body (6) through a hot medium inlet arranged at the center of a splitter plate (1) in the shell of the absorption tower, a hot side outlet pipe box (303) at the lower part of the plate cooler (3) is communicated with the distributor (4) through a detachable flange, and a plurality of chimney barrels (2) are arranged in the radial direction of the splitter plate (1); and cold side inlet and outlet pipe boxes of the plate cooler (3) are in through connection with a cold medium inlet and outlet arranged on the wall of the tower section (5) through detachable flanges.

3. The cooling device arranged in the absorption tower according to claim 2, wherein the chimney barrel (2) is composed of a shielding cap (201), a plurality of supporting ribs (202) and a barrel section (203), the barrel section (203) is arranged along the radial direction of the flow distribution plate (1) and is higher than the flow distribution plate, one end of each supporting rib (202) is connected with the barrel section (203), and the other end of each supporting rib is connected with the shielding cap (201).

4. The cooling device arranged in the absorption tower as claimed in claim 3, wherein the chimney is a one-way valve.

5. The cooling device with built-in absorption tower according to claim 2, wherein the plate cooler (3) is arranged vertically or horizontally in the tower.